Sean's also has a water/methanol tank that fits the Viper specifically, behind the right rear wheel with the filler in the trunk. Its size should be that it needs as much of a refill as the gas tank. Straight distilled water can be run in it - the methanol only provides a partial improvement in cooling (but not enough to change the timing) and the methanol also prevents the water tank from freezing in cold weather. I'm in the first group to be getting one. Dyno test will follow shortly after the instalation.